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B. 第二阶段/拓扑练习/0828_BFD和静态路由.md Normal file
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# BFD和静态路由
![image-20240828140643096](https://picgo-noriu.oss-cn-beijing.aliyuncs.com/Images/image-20240828140643096.png)
### 一、配IP
- **AR1**
```
[AR1]int g0/0/2
[AR1-GigabitEthernet0/0/2]ip add 192.168.1.254 24
[AR1-GigabitEthernet0/0/2]int g0/0/0
[AR1-GigabitEthernet0/0/0]ip add 192.168.12.1 24
[AR1-GigabitEthernet0/0/0]int g0/0/1
[AR1-GigabitEthernet0/0/1]ip add 192.168.13.1 24
[AR1-GigabitEthernet0/0/1]quit
[AR1]ip route-static 192.168.2.0 24 192.168.12.2
[AR1]ip route-static 192.168.2.0 24 192.168.13.2 preference 100
```
- **AR2**
```
[AR2]int g0/0/0
[AR2-GigabitEthernet0/0/0]ip add 192.168.12.2 24
[AR2-GigabitEthernet0/0/0]int g0/0/1
[AR2-GigabitEthernet0/0/1]ip add 192.168.24.2 24
[AR2-GigabitEthernet0/0/1]quit
[AR2]ip route-static 192.168.1.0 24 192.168.12.1
[AR2]ip route-static 192.168.2.0 24 192.168.24.4
```
- **AR3**
```
[AR3]int g0/0/0
[AR3-GigabitEthernet0/0/0]ip add 192.168.13.3 24
[AR3-GigabitEthernet0/0/0]int g0/0/1
[AR3-GigabitEthernet0/0/1]ip add 192.168.34.3 24
[AR3-GigabitEthernet0/0/1]quit
[AR3]ip route-static 192.168.1.0 24 192.168.13.1
[AR3]ip route-static 192.168.2.0 24 192.168.34.4
```
- **AR4**
```
[AR4]int g0/0/0
[AR4-GigabitEthernet0/0/0]ip add 192.168.24.4 24
[AR4-GigabitEthernet0/0/0]int g0/0/1
[AR4-GigabitEthernet0/0/1]ip add 192.168.34.4 24
[AR4-GigabitEthernet0/0/1]int g0/0/2
[AR4-GigabitEthernet0/0/2]ip add 192.168.2.254 24
[AR4-GigabitEthernet0/0/2]quit
[AR4]ip route-static 192.168.1.0 24 192.168.24.2
[AR4]ip route-static 192.168.1.0 24 192.168.34.3 preference 100
```
### 二、BFD
- **AR1**
```
[AR1]ip route-static 192.168.24.0 24 192.168.12.2
[AR1]ip route-static 192.168.34.0 24 192.168.13.3
[AR1]bfd
[AR1-bfd]quit
[AR1]bfd ntd2407 bind peer-ip 192.168.24.4
[AR1-bfd-session-ntd2407]discriminator local 1
[AR1-bfd-session-ntd2407]discriminator remote 4
[AR1-bfd-session-ntd2407]min-tx-interval 10
[AR1-bfd-session-ntd2407]min-rx-interval 10
[AR1-bfd-session-ntd2407]commit
```
- *注解：*
1. `[AR1]bfd`：进入BFD配置模式
2. `[AR1-bfd]quit`：退出BFD配置模式
3. `[AR1]bfd ntd2407 bind peer-ip 192.168.24.4`：创建一个名为`ntd2407`的BFD会话，并将其绑定到对端IP地址`192.168.24.4`
4. `[AR1-bfd-session-ntd2407]discriminator local 1`：为本地设备设置BFD会话的鉴别器值为`1`
5. `[AR1-bfd-session-ntd2407]discriminator remote 4`：设置对端设备BFD会话的鉴别器值为`4`
6. `[AR1-bfd-session-ntd2407]min-tx-interval 10`：设置BFD会话的最小发送间隔为`10`毫秒
7. `[AR1-bfd-session-ntd2407]min-rx-interval 10`：设置BFD会话的最小接收间隔为`10`毫秒
8. `[AR1-bfd-session-ntd2407]commit`：提交BFD会话的配置，使其生效
- **AR4**
```
[AR4]ip route-static 192.168.12.0 24 192.168.24.2
[AR4]ip route-static 192.168.13.0 24 192.168.34.3
[AR4]bfd
[AR4-bfd]quit
[AR4]bfd ntd2407 bind peer-ip 192.168.12.1
[AR4-bfd-session-ntd2407]discriminator local 4
[AR4-bfd-session-ntd2407]discriminator remote 1
[AR4-bfd-session-ntd2407]min-tx-interval 10
[AR4-bfd-session-ntd2407]min-rx-interval 10
[AR4-bfd-session-ntd2407]commit
```
- *注解：*
1. `[AR1]bfd`：进入BFD配置模式
2. `[AR1-bfd]quit`：退出BFD配置模式
3. `[AR1]bfd ntd2407 bind peer-ip 192.168.12.1`：创建一个名为`ntd2407`的BFD会话，并将其绑定到对端IP地址`192.168.12.1`
4. `[AR1-bfd-session-ntd2407]discriminator local 4`：为本地设备设置BFD会话的鉴别器值为`4`
5. `[AR1-bfd-session-ntd2407]discriminator remote 1`：设置对端设备BFD会话的鉴别器值为`1`
6. `[AR1-bfd-session-ntd2407]min-tx-interval 10`：设置BFD会话的最小发送间隔为`10`毫秒
7. `[AR1-bfd-session-ntd2407]min-rx-interval 10`：设置BFD会话的最小接收间隔为`10`毫秒
8. `[AR1-bfd-session-ntd2407]commit`：提交BFD会话的配置，使其生效